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Chapter 29: Q51P (page 1194)

Draw the structure for each peptide:

(a) Phe–Ala;

(b) Gly–Gln;

(c) Lys–Gly;

(d) R-H

Short Answer

Expert verified

a.

b.

C.

d.

Step by step solution

01

Peptide

Peptides are short chains of amino acid monomers linked with the peptide bonds. The shortest peptide are said to be di-peptides consisting of 2 amino acids linked by single peptide bond as followed by tri-peptide, tetra-peptide, and so on.

02

Structures of peptides

Phe-Ala, Gly-Gln, Lys-Gly, and R-H are dipeptide which has 2 amino acids with same/different constituent.

(a) Phe-Ala

Structure of Phe-Ala

(b) Gly-Gln

Structure of Gly-Gln

(c) Lys-Gly

Structure of Lys-Gly

(d) R-H

Structure of R-H

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Most popular questions from this chapter

Glutamic acid is synthesized by the following reaction sequence. Draw a stepwise mechanism for Steps [1]–[3].

Devise a synthesis of each amino acid from acetaldehyde (CH3CHO):

(a) Glycine;

(b) Alanine.

Question: Propose a structure for a compound of molecular formula \({{\bf{C}}_{\bf{7}}}{{\bf{H}}_{{\bf{14}}}}{{\bf{O}}_{\bf{2}}}\) with an IR absorption at \({\bf{1740}}\;{\bf{c}}{{\bf{m}}^{{\bf{ - 1}}}}\) and the following \({}^{\bf{1}}{\bf{H}}\) NMR data:

\(\begin{array}{*{20}{c}}{{\bf{Absorption}}}&{{\bf{ppm}}}&{{\bf{Relative}}\;{\bf{area}}}\\\hline{{\bf{singlet}}}&{{\bf{1}}{\bf{.2}}}&{\bf{9}}\\{{\bf{triplet}}}&{{\bf{1}}{\bf{.3}}}&{\bf{3}}\\{{\bf{quartet}}}&{{\bf{4}}{\bf{.1}}}&{\bf{2}}\end{array}\)

Draw all the steps in the synthesis of each peptide from individual amino acids:

  1. Gly-Ala;

  2. Ile-Ala-Phe

How many different tripeptides can be formed from three different amino acids?
See all solutions

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